More than a dozen former Ronald Reagan staff members have joined dozens of other Republican figures endorsing the Democratic nominee and vice-president, Kamala Harris, saying their support was “less about supporting the Democratic party and more about our resounding support for democracy”.
They already are. Present day Democrats have George W Bush era Republican vibes. The Overton Window has shifted far to the right. That ratchet effect always has liberals shifting to the right.
The American left and right have always agreed on the role of the individual voter in the government, and the role of the government generally. They only vary on who they think should be allowed to have rights, and the rights they should have. They generally agree on economics, business, the police, and the military industrial complex. Each of which contribute to the general oppression of the non-rich citizens.